Jump to content
SAU Community

Recommended Posts

I'm trying to get my head around this 6 stroke engine. Correct if I am wrong:

Stroke 1: Induction

Piston moves down, sucking in fuel and air through the carby

Stroke 2: "Primary" Compression

Piston moves up, compressing air and fuel

Ignition:

Fuel is ignited as piston approached top dead centre.

Stroke 3: "Primary" Expansion

Burning air and fuel expands rapidly, pushing the piston down.

Stroke 4: "Primary" Exhaust / "Secondary" Compression

Piston moves up, driving out exhaust gases. Unlike a traditional engine, the aim is not to remove all exhaust gas in this stroke, but leave some hot gases present. It was mentioned in the article that he was experimenting with not letting the exhaust valves open at all druing this stroke! The remaining hot exhaust gases are compressed in this stroke as the piston moves up, increasing pressure and hence heating it up

Water Injection:

Water is injected into the chamber with the super hot exhaust gases, causing it to boil and create steam.

Stroke 5: "Secondary" Expansion

The water boils, rapidly expanding into steam, driving the piston down in a second power stroke. As the gas boils, heat energy is absorbed from the surrounding environment, effectively cooling the engine.

Stroke 6: "Secondary" Exhaust

Piston moves up, driving out the remaining gases through the exhaust valve.

Rinse and Repeat.

The advantage of this engine is that it has two power strokes for every 3 crankshaft rotations. This should give increased engine power over a four stroke engine, which has one power stroke for every two crankshaft rotations.

Almost like two stroke power levels with better economy than a four stroke!

The cooling effect would allow increased compression ratios, or more turbo boost pressure for skyline fans, without the need for higher grade fuels. Potentially, it could remove the need for an intercooler in turbo cars, greatly reducing losses through the induction system.

Additionally, one of the power strokes uses water for power rather than fuel, so your fuel bill will be divided into half water, half petrol, and obviously water is a lot cheaper than petrol and will hence save you money.

Link to comment
https://www.sau.com.au/forums/topic/109772-6-stroke-engine/#findComment-2024480
Share on other sites

Yeah he wont be around for much longer......as in the Gentleman who made the Delorean.....Stainless Steel Panels = Drives panel beaters out of business, so he got a good talking to.

As in the people who made the Ceramic engine (EXTREMELY efficient).......that didnt go into production.

Or the various back yard projects which have had Hydrogen engines etc etc, fill it up with your graden hose and a wayyyyy you go.

All these things have been thought about and done. They dont see production because of the big business's sending goons after them.

If you guys dont hear from me again, you can have my Charade..............only if you plaster it with GTR badges though :)

Edited by Dingo
Link to comment
https://www.sau.com.au/forums/topic/109772-6-stroke-engine/#findComment-2024919
Share on other sites

Yeah he wont be around for much longer......as in the Gentleman who made the Delorean.....Stainless Steel Panels = Drives panel beaters out of business, so he got a good talking to.

As in the people who made the Ceramic engine (EXTREMELY efficient).......that didnt go into production.

Or the various back yard projects which have had Hydrogen engines etc etc, fill it up with your graden hose and a wayyyyy you go.

All these things have been thought about and done. They dont see production because of the big business's sending goons after them.

If you guys dont hear from me again, you can have my Charade..............only if you plaster it with GTR badges though :O

Hey man - Paranoia is an UNJUSTIFIED belief that people are out there trying to get you. John DeLorean was actually set up by the FBI - true story. That his car company was dodgy, did all manner of illegal sh!t & was always headed for disaster is a whole other conspiracy, er story. By the way Colin Chapman is alive & well & living in South America. I have it on good authority the Ferrari's recent about turn in form is due to some of his consultancy work.

Oh, yeah you forgot to mention that the real reason Kennedy was assassinated because he told Marylin Monroe the truth about the UFO's......

Gotta go, someone is watching me. :)

Link to comment
https://www.sau.com.au/forums/topic/109772-6-stroke-engine/#findComment-2024990
Share on other sites

I'm trying to get my head around this 6 stroke engine. Correct if I am wrong:

Stroke 1: Induction

Piston moves down, sucking in fuel and air through the carby

Stroke 2: "Primary" Compression

Piston moves up, compressing air and fuel

Ignition:

Fuel is ignited as piston approached top dead centre.

Stroke 3: "Primary" Expansion

Burning air and fuel expands rapidly, pushing the piston down.

Stroke 4: "Primary" Exhaust / "Secondary" Compression

Piston moves up, driving out exhaust gases. Unlike a traditional engine, the aim is not to remove all exhaust gas in this stroke, but leave some hot gases present. It was mentioned in the article that he was experimenting with not letting the exhaust valves open at all druing this stroke! The remaining hot exhaust gases are compressed in this stroke as the piston moves up, increasing pressure and hence heating it up

Water Injection:

Water is injected into the chamber with the super hot exhaust gases, causing it to boil and create steam.

Stroke 5: "Secondary" Expansion

The water boils, rapidly expanding into steam, driving the piston down in a second power stroke. As the gas boils, heat energy is absorbed from the surrounding environment, effectively cooling the engine.

Stroke 6: "Secondary" Exhaust

Piston moves up, driving out the remaining gases through the exhaust valve.

Rinse and Repeat.

The advantage of this engine is that it has two power strokes for every 3 crankshaft rotations. This should give increased engine power over a four stroke engine, which has one power stroke for every two crankshaft rotations.

Almost like two stroke power levels with better economy than a four stroke!

The cooling effect would allow increased compression ratios, or more turbo boost pressure for skyline fans, without the need for higher grade fuels. Potentially, it could remove the need for an intercooler in turbo cars, greatly reducing losses through the induction system.

Additionally, one of the power strokes uses water for power rather than fuel, so your fuel bill will be divided into half water, half petrol, and obviously water is a lot cheaper than petrol and will hence save you money.

The secondary power stroke is not going to have the same power as the primary one though so you may have balancing or harmonic issues unless there are a lot of cylinders, like 8 or more.

Link to comment
https://www.sau.com.au/forums/topic/109772-6-stroke-engine/#findComment-2027903
Share on other sites

Hey man - Paranoia is an UNJUSTIFIED belief that people are out there trying to get you.

Oh, yeah you forgot to mention that the real reason Kennedy was assassinated because he told Marylin Monroe the truth about the UFO's......

Gotta go, someone is watching me. :(

Ahmen Brother! :(

Paranoya nothing man! He lives!!

bigfoot.jpg

Edited by Dingo
Link to comment
https://www.sau.com.au/forums/topic/109772-6-stroke-engine/#findComment-2028968
Share on other sites

The steam stroke would'nt have as much power but in a 6cylinder it would harmonise well. I wonder if you would do without cooling though as its not just combustion that generates heat, electric motors and gearboxes get hot too.

Link to comment
https://www.sau.com.au/forums/topic/109772-6-stroke-engine/#findComment-2029197
Share on other sites

not neceserally sky

think bout water injected cooling systems

water is directly injected into the air intake to cool it down

compression ratios are turned up for the loss of fuel(or down i cant remeber)

and it is all honky dorry

Link to comment
https://www.sau.com.au/forums/topic/109772-6-stroke-engine/#findComment-2030147
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Ah. OK. I take it back. I hadn't looked closely at the R33/4 arms and presumed that GKTech did as GKTech do everywhere else, which is to use sphericals there. The poly bushings are made to be 100% interchangeable, should use the standard bolt just fine. Every other bush in every other place in pretty much every other car, does.
    • @silviaz Ok cool, so much easier with a video. I can see why this video would be confusing for new players.   It is obvious that this entire bonnet is going to be resprayed, have a look in the background around 2:05, you can see a bunch of bare metal on the left side of the bonnet.  It's not an issue for the primer being laid down on the non-prepped clear on the bonnet. It will be sanded off at a later stage.  This might not be obvious to new players, but working on bare metal and factory paint in this instance, the factory paint is like a mountain and the bare metal is a huge valley. The bonnet needs to be levelled flat before it receives it's final stage of colour and clear coat. During this levelling process, the primer that is landing on the clear that you are worried about will be removed.  Also, this guy is out of control. Zero PPE while spraying, maybe he is a good example overall about what not to do lol.
    • Ok I FINALLY found a video lol. This took way longer than it should have as I could have sworn I saw multiple videos like this. I kept finding the completely opposite (the correct way of doing this). I wouldn't be surprised if I f**ked this up somehow.  I just realised where I've been getting confused and even with other things I work on. I haven't been doing things the regular way instead I'm going a roundabout way of doing things, like putting epoxy primer first then filler for example instead of putting just filler then primer on top of that, then wondering what happens if I get that primer on the clear coat that I haven't sanded yet. This was a bit of an epiphany 😂  But anyways, here this video. Time stamp, 2:56, some of the primer lands on the paint unscuffed above. You can see from the reflection it looks shiny.  
    • It does, this part circled in red. I assume the OEM bolt might not work well with the poly bushing because the dimensions may be different?
    • The J arm doesn't have bushes either. Assuming that by "J arm" you mean the part of the upright that runs down from the upper arm's outer bushes to the top of the hub. That has a kingpin style bearing in it. If you meant the lower control arm, it has 1 bush, at its inner end. If you have PU in there, that is superior to Nismo rubber. If you meant the caster/tension rod - it has 1x bush at the front end, and again PU is superior to Nismo rubber. But as I said above, I would definitely get the GKTech arms for that, as sphericals slay all other options there.
×
×
  • Create New...